光学精密工程2023，Vol.31Issue(22)：3318-3330,13.DOI:10.37188/OPE.20233122.3318
适应动态加速度场的压电-液压串联复合激振装置研制
Development of a piezoelectric-hydraulic series hybrid vibration exciter undergoing dynamic overloads
摘要
Abstract
A light-weight and wide-bandwidth vibration exciter operating in dynamic overload environ-ments was developed to conduct combined simulations of dynamic overload and time-varying vibration.A piezoelectric-hydraulic series hybrid vibration excitation method and corresponding configuration are pro-posed to solve the problem of narrow bandwidth with light weight or heavy weight with wide bandwidth.A six-element piezoelectric parallel excitation module was designed and the corresponding precise assem-bly technology was built,achieving a parallel excitation efficiency of 74.2%.A hydraulic embedded cen-tering method is also proposed for the hydraulic actuator to operate in dynamic overload environments.In addition,a hydraulic excitation module with a novel cylinder-in-cylinder configuration was developed.The frequency-division control method for series hybrid excitation systems was designed based on a frequency divider,with the hydraulic and piezoelectric vibration excitation modules working coordinately and loading with equilibrium.Combining force balance control with zero-displacement feedback compensation,a cen-tering control method was designed for the hydraulic excitation module.Thus,precise centering in dynam-ic overloads was accomplished.Two time-varying vibration control methods,namely variable gain and long-duration waveform replication methods,are proposed,and the integrative control system was devel-oped as well.Performance tests show that the developed hydraulic-piezoelectric series hybrid vibration ex-citer features excitation abilities of acceleration over 6 grms and frequency band covering 10-2 000 Hz for a payload over 50 kg in centrifugal overload exceeding 60 g and overload rate exceeding 15 g/s,respective-ly.The exciter was installed on a dynamic centrifuge and applied in a number of tests for inertial sensors,assemblies,and systems with good load control effects.In comparison to real flight tests,the dynamic overload-vibration simulation technique presented in this paper provides a more efficient and more economi-cal laboratory approach for testing functional properties of guidance and control systems of aircrafts and spacecrafts,especially for large sample test data accumulation.关键词
压电激振/液压激振/柔性机构/微位移放大/离心机Key words
hydraulic excitation/piezoelectric excitation/compliant mechanism/micro-displacement am-plification/centrifuge分类
机械工程引用本文复制引用
毛勇建,李明海,何颖波,严侠,刘谦,凌明祥,康甜..适应动态加速度场的压电-液压串联复合激振装置研制[J].光学精密工程,2023,31(22):3318-3330,13.基金项目
国防技术基础重点项目资助(No.JSHS2018212C001) （No.JSHS2018212C001）
